Conformationally Assisted Lactamizations for the Synthesis of Symmetrical and Unsymmetrical Bis-2,5-diketopiperazines
摘要:
Open-chain N-Cbz-protected-peptidoyl benzotriazolides are converted by a novel lactamization strategy using proline as a turn introducer into both symmetrical (5a-c and 11a-c) and unsymmetrical (19a-e) bis-2,5-diketopiperazines (bis-2,5-DKPs), previously recognized as difficult targets.
A benzotriazole-mediated route to protected marine-derived hetero-2,5-diketopiperazines containing proline
作者:Olivier Nsengiyumva、Sadra Hamedzadeh、James McDaniel、Jocelyn Macho、Grant Simpson、Siva S. Panda、Khanh Ha、Iryna Lebedyeva、Hassan M. Faidallah、Manal Metgen AL-Mohammadi、C. Dennis Hall、Alan R. Katritzky
DOI:10.1039/c5ob00023h
日期:——
Dipeptidoyl benzotriazolides containing proline were cyclized by triethylamine into 2,5-diketopiperazines.
METHOD FOR THE PREPARATION OF (3S, 3S') 4,4'-DISULFANEDIYLBIS (3-AMINOBUTANE 1-SULFONIC ACID)
申请人:Balavoine Fabrice
公开号:US20130231500A1
公开(公告)日:2013-09-05
The present invention relates to a new method for the preparation of (3S,3S′) 4,4′-disulfanediylbis(3-aminobutane 1-sulfonic acid) in five steps from (S)-ethyl 2-(benzyloxycarbonylamino)-4-(neopentyloxysulfonyl)butanoate A.
Method for the preparation of (3S, 3S′) 4,4′-disulfanediylbis (3-aminobutane 1-sulfonic acid)
申请人:Balavoine Fabrice
公开号:US09187418B2
公开(公告)日:2015-11-17
The present invention relates to a new method for the preparation of (3S,3S′) 4,4′-disulfanediylbis(3-aminobutane 1-sulfonic acid) in five steps from (S)-ethyl 2-(benzyloxycarbonylamino)-4-(neopentyloxysulfonyl)butanoate A.
Method for the preparation of (3S,3S′) 4,4′-disulfanediylbis (3-aminobutane 1-sulfonic acid)
申请人:QUANTUM GENOMICS
公开号:US09340497B2
公开(公告)日:2016-05-17
The present invention relates to a new method for the preparation of (3S,3S′) 4,4′-disulfanediylbis(3-aminobutane 1-sulfonic acid) in five steps from (S)-ethyl 2-(benzyloxycarbonylamino)-4-(neopentyloxysulfonyl)butanoate A.
METHOD FOR THE PREPARATION OF (3S,3S') 4,4'-DISULFANEDIYLBIS (3-AMINOBUTANE 1-SULFONIC ACID)
申请人:QUANTUM GENOMICS
公开号:US20160046571A1
公开(公告)日:2016-02-18
The present invention relates to a new method for the preparation of (3S,3S′) 4,4′-disulfanediylbis(3-aminobutane 1-sulfonic acid) in five steps from (S)-ethyl 2-(benzyloxycarbonylamino)-4-(neopentyloxysulfonyl)butanoate A.